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8 RTK Mapping
8.5.2 Exporting RTK Data
The Export utility of the GPS Pathfinder Office software provides
tools for filtering the data exported, based on the quality of the
positions, and for exporting the precision estimate values for each
feature.
Including RTK positions for export
To include all RTK positions within the data set to be exported, select
the check box associated with RTK Float and RTK Fixed in the Filter
by GPS Position Info box. If, for example, you only want RTK
positions to be exported, then ensure all check boxes are cleared
except for the RTK Float and RTK Fixed check boxes. Select only
RTK Fixed if you want only the most precise RTK positions. Positions
derived using an RTK Float solution are less precise than those
derived using an RTK Fixed solution. For more information on Fixed
and Float solutions, see Code and phase measurements, page 189.
Filtering by RTK precision
Because RTK positions can have precision estimates associated with
them, you can filter your RTK data set by identifying precision
tolerances within which the precision of a position must fall before it
will be exported. To enable filtering based on the RTK precision
values, select the Filter by RTK Precision (68% confidence) option on
the Position Filter Criteria dialog.
Note – Select Options / Units (in the GPS Pathfinder Office main
program) to change the confidence level from the default 68%.
Precision estimates associated with RTK positions are displayed using
the confidence level set in the Units dialog of the GPS Pathfinder
Office main program (here 99%). The data can be filtered based on a
combination of the horizontal and vertical precision components of a
position.
228 TSC1 Asset Surveyor Operation Manual